page output cache with "VaryByParm" & "VaryByCustom"

[smallpotato]

Hi, I have some qns about page cache with "VaryByParm" & "VaryByCustom".

At first, I use the page directive to set the output cache with "VaryByParm" on all query variables. The pages work fine.

Then, I changed it to set them at code behind. Since the page cache need to be depend on some session var, I'm trying to make use the "VaryByCustom" but the session info can't be obtained at the global.asax.

Any ideas on how to make this?
Thx in advance.

 

[ca8msm]

but the session info can't be obtained at the global.asax

Try using the httpContext.Current object


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[smallpotato]

thanks ca8msm's suggestion but the session obj still can't be referenced with httpContext.Current object.

 

[ca8msm]

Yes it can


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[smallpotato]

The httpContext.Current.Session is nothing when access it is referenced at the

public override string GetVaryByCustomString(HttpContext context, string arg){
return httpContext.Current.Session("xxxx")
}

under the global.asax

I'm using asp.net 1.1 and not sure whether the session would be access at the "GetVaryByCustomString" method. But I really need to have page cache based on the session variables. Any ideas on this issue?